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What is the difference between match_parent and fill_parent?
I'm a little confused about two XML properties: match_parent and fill_parent . It seems that both are the same. Is there any difference between them?
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Multiple inheritance/prototypes in JavaScript
...ome to a point where I need to have some sort of rudimentary multiple inheritance happening in JavaScript. (I'm not here to discuss whether this is a good idea or not, so please kindly keep those comments to yourself.)
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How can I check for “undefined” in JavaScript? [duplicate]
...terested in finding out whether a variable has been declared regardless of its value, then using the in operator is the safest way to go. Consider this example:
// global scope
var theFu; // theFu has been declared, but its value is undefined
typeof theFu; // "undefined"
But this may not be the i...
Best approach for designing F# libraries for use from both F# and C#
... a document that explains how to design F# and .NET libraries using F# and it should answer many of your questions.
When using F#, there are basically two kinds of libraries you can write:
F# library is designed to be used only from F#, so it's public interface is written in a functional style (u...
Is an empty href valid?
... string may be a URI reference.
HTML 4.01
HTML 4.01 uses RFC 2396, where it says in section 4.2. Same-document References (bold emphasis mine):
A URI reference that does not contain a URI is a reference to the current document. In other words, an empty URI reference within a document is inter...
What does the “__block” keyword mean?
What exactly does the __block keyword in Objective-C mean? I know it allows you to modify variables within blocks, but I'd like to know...
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How to navigate back to the last cursor position in Visual Studio?
What is the keyboard shortcut navigate back to the last cursor position in Visual Studio?
5 Answers
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Check if directory mounted with bash
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Running the mount command without arguments will tell you the current mounts. From a shell script, you can check for the mount point with grep and an if-statement:
if mount | grep /mnt/md0 > /dev/null; then
echo "yay"
else
echo "nay"
fi
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Reducing MongoDB database file size
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UPDATE: with the compact command and WiredTiger it looks like the extra disk space will actually be released to the OS.
UPDATE: as of v1.9+ there is a compact command.
This command will perform a compaction "in-line". It will stil...
Which @NotNull Java annotation should I use?
...nar) to avoid NullPointerExceptions. Many of the tools seem incompatible with each others' @NotNull / @NonNull / @Nonnull annotation and listing all of them in my code would be terrible to read. Any suggestions of which one is the 'best'? Here is the list of equivalent annotations I've found:
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